Improvement in sewing-machines



R. BARCLAY.

Sewing Machine- MPETERS. PHuTo-LITHQGRAFMER. vIASHINmoN. D C.

UNITED STATES PATENT FFICE.

ROBERT BAROLAY-', OF BUFFALO, NEW YORK.

IMPROVEMENT IN SEWINGfMACHINES.

Specification forming part of Letters Patent No. 81,328, dated August25, 1868.

To all whom fit may concern:

Be it known that I, ROBERT BARcLAY, of Buffalo, in the county of Erieand State of New York, have invented a new and Improved Sewing-Machine;and I do hereby declare that the following is a full, clear, and exactdescription thereof, which will enable those skilled in the art to makeand use the same, reference being had to the accompanying drawings,forming part of this specification.

This invention relates to a new and improved sewing-machine; and itconsists in a novel feed mechanism and a take-up movement for thethread, as hereinafter fully shown and described, whereby simplicity,economy in construction, and durability of the working parts areobtained.

In the accompanying sheet of drawings, Figure l is a longitudinalvertical section of my invention, taken in the line .fr Fig. 2 5 Fig. 2,a transverse vertical section of the same, taken in the line y y, Fig.l; Fig. 3, a transverse vertical section of the same, taken in the linez z, Fig. l.

Similar letters of reference indicate corresponding parts.

A represents the bed of the sewing-machine; B, the arm attached thereto,and C the driving-shaft, which passes horizontally through the arm, andhas a balance-wheel, D, on its rear end, said balance-wheel havingaconcentric crank-pulley, E, attached to its outer side, and two cams, FF, at its inner side. G is a connecting-rod attached to the crankpulleyE, and to a crank, a, at the rear end of arockshaft, H, placedlongitudinally underneath the bed, and having` an arm, I, at its frontend, the upper end of said arm being connected to a shuttle-carrier, J,to which, by the means above referred to, a reciprocating movement isgiven from the driving-shaft. K K are two upright levers, which are madeto press against the cams F F by means of springs b b. (See Fig. 3.)These levers are attached at their lower placed longi- A of the maendsto shafts L L', which are tudinally underneath the bed chine, and on thefront ends of these shafts there are secured, respectively, arms M M',which, in connection with a spring, N, operate the feed-bar O, the arm Mof shaft L giving the longitudinal movement to said bar, and the arm Mof shaft L giving the rising movement to said bar, while the spring Ngives the return movement to the same, the falling movement of thefeed-bar being due to its own gravity only. This operation will be fullyunderstood by referring to Fig. 2.'

O11 the front end of the drivin g-shaft C there is a cam, l?, which hasa stud, c, projecting from it, said stud Working in a slot in ahorizontal bar, d, attached to -the needle-bar Q. (See Figs. l and 2.)

The cam l? acts against a lever, R, and they latter actuates an arm,S,Which projects through a slot in the front plate T of the machine,said arm having a spring, U, bearing upon hit, which spring has atendency to keep the arm S down. (See Fig. l.)

Below the arm S there is a similar arm, V, which also has a spring, c,bearing upon it, and the thread f passes from the spool through theouter end of V, thence upward through the outer end of the arm S, anddown through the eye of the needle.

The arm S constitutes the takeup, and

the arm V works, in connection with S, in suc-h a manner as to yieldl orgive When any eXtra strain comes upon the thread, thereby preventing thebreaking of the latter by any undue tension.

I claim as new and desire to secure by Letters Patent- The cam P andlever R, in combination with the spring-arms S and V, constructed andarranged to operate as and for the purpose set forth.

The above specification of my invention signed by me this 16th day ofApril, 1868.

. ROBT. BARCLAY.

Witnesses:

MAURIGE GoURTNnY, RUDOLF voN ToBEL.

